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Confocal microscopic images of cellular uptake cocultured with doxorubicin-loaded micelles. The composition of mPEG–PCL-g–PEI copolymer was 5000-2000-2000. (A) Free doxorubicin, 1 hour, (B) free doxorubicin, 4 hours, (C) doxorubicin-loaded micelles, 1 hour, and (D) doxorubicin-loaded micelles, 4 hours.
Note: The scale bar in images is 47.62 μm.
Abbreviations: PEG, polyethylene glycol; PCL, poly ɛ-caprolactone; PEI, polyethylenimine.
